US4845504A - Mobile radio network for nationwide communications - Google Patents
Mobile radio network for nationwide communications Download PDFInfo
- Publication number
- US4845504A US4845504A US07/035,791 US3579187A US4845504A US 4845504 A US4845504 A US 4845504A US 3579187 A US3579187 A US 3579187A US 4845504 A US4845504 A US 4845504A
- Authority
- US
- United States
- Prior art keywords
- receive
- transmit
- sectors
- station
- message
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/04—Scheduled or contention-free access
- H04W74/06—Scheduled or contention-free access using polling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
φ.sub.A =2cosφ·360°
Claims (18)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/035,791 US4845504A (en) | 1987-04-08 | 1987-04-08 | Mobile radio network for nationwide communications |
PCT/US1988/001062 WO1988008140A1 (en) | 1987-04-08 | 1988-04-05 | Mobile radio network for nationwide communications |
AU18076/88A AU1807688A (en) | 1987-04-08 | 1988-04-05 | Mobile radio network for nationwide communications |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/035,791 US4845504A (en) | 1987-04-08 | 1987-04-08 | Mobile radio network for nationwide communications |
Publications (1)
Publication Number | Publication Date |
---|---|
US4845504A true US4845504A (en) | 1989-07-04 |
Family
ID=21884807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/035,791 Expired - Lifetime US4845504A (en) | 1987-04-08 | 1987-04-08 | Mobile radio network for nationwide communications |
Country Status (3)
Country | Link |
---|---|
US (1) | US4845504A (en) |
AU (1) | AU1807688A (en) |
WO (1) | WO1988008140A1 (en) |
Cited By (94)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5032845A (en) * | 1990-02-08 | 1991-07-16 | D.G.R., Inc. | Vehicle locating system with Loran-C |
US5046130A (en) * | 1989-08-08 | 1991-09-03 | Motorola, Inc. | Multiple communication path compatible automatic vehicle location unit |
US5134715A (en) * | 1989-11-17 | 1992-07-28 | Sundstrand Corporation | Meteor scatter burst communications systems |
US5278568A (en) * | 1992-05-01 | 1994-01-11 | Megapulse, Incorporated | Method of and apparatus for two-way radio communication amongst fixed base and mobile terminal users employing meteor scatter signals for communications inbound from the mobile terminals and outbound from the base terminals via Loran communication signals |
GB2271246A (en) * | 1992-10-03 | 1994-04-06 | Motorola Ltd | Sectorized cellular radio base station antenna |
US5488737A (en) * | 1992-11-17 | 1996-01-30 | Southwestern Bell Technology Resources, Inc. | Land-based wireless communications system having a scanned directional antenna |
US5500650A (en) * | 1992-12-15 | 1996-03-19 | Micron Technology, Inc. | Data communication method using identification protocol |
US5583850A (en) * | 1992-12-15 | 1996-12-10 | Micron Technology, Inc. | Data communication system using identification protocol |
US5596333A (en) * | 1994-08-31 | 1997-01-21 | Motorola, Inc. | Method and apparatus for conveying a communication signal between a communication unit and a base site |
US5608412A (en) * | 1995-06-07 | 1997-03-04 | General Electric Company | Protocol and mechanism for mutter mode communication for stationary master tracking unit |
US5754139A (en) * | 1996-10-30 | 1998-05-19 | Motorola, Inc. | Method and intelligent digital beam forming system responsive to traffic demand |
US5835061A (en) * | 1995-06-06 | 1998-11-10 | Wayport, Inc. | Method and apparatus for geographic-based communications service |
US6052582A (en) * | 1994-03-17 | 2000-04-18 | Endlink Corporation | Sectorized multi-function communication system |
US6233459B1 (en) * | 1997-04-10 | 2001-05-15 | The Atlantis Company, Limited, Japan | System for providing Geolocation of a mobile transceiver |
US6259405B1 (en) | 1995-06-06 | 2001-07-10 | Wayport, Inc. | Geographic based communications service |
US20010014090A1 (en) * | 1998-02-19 | 2001-08-16 | Wood Clifton W. | Method of addressing messages and communications system |
WO2002043288A1 (en) * | 2000-11-21 | 2002-05-30 | Starcom Wireless, Inc. | Meteor burst communication system having the capability of simultaneous communication with multiple remote units |
US6414635B1 (en) | 2000-10-23 | 2002-07-02 | Wayport, Inc. | Geographic-based communication service system with more precise determination of a user's known geographic location |
US20020094821A1 (en) * | 2000-12-11 | 2002-07-18 | Kennedy Joseph P. | Pseudolite positioning system and method |
US20020094824A1 (en) * | 2001-01-16 | 2002-07-18 | Kennedy Joseph P. | Method and system for applying wireless geolocation technology |
US20030003959A1 (en) * | 2001-06-28 | 2003-01-02 | Tsui Ernest T. | Antenna for wireless systems |
US20030032424A1 (en) * | 2001-08-13 | 2003-02-13 | Judd Mano D. | Shared tower system for accomodating multiple service providers |
US20040132466A1 (en) * | 2002-12-23 | 2004-07-08 | Kennedy Joseph P. | Method and apparatus for supporting multiple wireless carrier mobile station location requirements with a common network overlay location system |
US6771716B1 (en) * | 1998-01-14 | 2004-08-03 | Stmicroelectronics S.A. | Method of communication with coherence checking and device for the implementation thereof |
US20040167958A1 (en) * | 1999-11-03 | 2004-08-26 | Stewart Brett B. | Distributed network communication system which enables multiple network providers to use a common distributed network infrastructure |
US6845240B2 (en) | 2000-12-11 | 2005-01-18 | Grayson Wireless | System and method for analog cellular radio geolocation |
US20050040961A1 (en) * | 1995-04-11 | 2005-02-24 | Tuttle John R. | RF identification system with restricted range |
US6871077B2 (en) | 2001-10-09 | 2005-03-22 | Grayson Wireless | System and method for geolocating a wireless mobile unit from a single base station using repeatable ambiguous measurements |
US20050147133A1 (en) * | 1999-11-15 | 2005-07-07 | Tang Hong D. | Systems, devices, and methods for providing services in a proximity based environment |
US20050192026A1 (en) * | 2003-06-04 | 2005-09-01 | Carlson John P. | System and method for CDMA geolocation |
US20060111124A1 (en) * | 2002-08-29 | 2006-05-25 | Andrew Corporation | System and method for geo-location of mobile appliances using diverse standard tasking and reporting |
US20060262800A1 (en) * | 2005-05-17 | 2006-11-23 | Martinez Dennis M | Multimode land mobile radio |
US20060262771A1 (en) * | 2005-05-17 | 2006-11-23 | M/A Com, Inc. | System providing land mobile radio content using a cellular data network |
US20070115114A1 (en) * | 2005-11-14 | 2007-05-24 | System Planning Corporation | System and method for using meteor burst comunications in a container tracking system |
US20070293239A1 (en) * | 2006-05-16 | 2007-12-20 | Andrew Corporation | Optimizing location services performance by combining user plane and control plane architectures |
US20080031207A1 (en) * | 2006-08-07 | 2008-02-07 | M/A-Com, Inc. | Multiple protocol land mobile radio system |
US20080031275A1 (en) * | 2006-08-07 | 2008-02-07 | M/A-Com, Inc. | Transcoder architecture for land mobile radio systems |
US20080097858A1 (en) * | 2004-05-21 | 2008-04-24 | Vucina David J | System, method and program product for delivery of digital content offerings at a retail establishment |
US20080117025A1 (en) * | 1992-12-15 | 2008-05-22 | Tuttle John R | RFID System and Method for Wirelessly Interfacing With an Interrogator |
US20080180221A1 (en) * | 2007-01-30 | 2008-07-31 | Micron Technology, Inc. | Systems and methods for RFID tag arbitration |
US20080188242A1 (en) * | 2007-02-05 | 2008-08-07 | Andrew Corporation | System and method for optimizing location estimate of mobile unit |
US20080212303A1 (en) * | 2007-03-02 | 2008-09-04 | Warren Farnworth | Device for reducing or preventing exchange of information |
US20080297324A1 (en) * | 2007-05-30 | 2008-12-04 | Micron Technology, Inc. | Methods and systems of receiving data payload of rfid tags |
USRE40686E1 (en) | 1998-02-19 | 2009-03-31 | Keystone Technology Solutions, Llc | Method of addressing messages and communications system |
US20090131075A1 (en) * | 2007-11-15 | 2009-05-21 | Commscope, Inc. Of North Carolina | System and method for locating an unknown base station |
US20090149171A1 (en) * | 2005-05-17 | 2009-06-11 | Andrew Corporation | Method and Apparatus for Determining Path Loss by Active Signal Detection |
US7583192B2 (en) | 1992-08-12 | 2009-09-01 | Keystone Technology Solutions, Llc | Radio frequency identification device and method |
US20100106774A1 (en) * | 2008-10-28 | 2010-04-29 | Andrew Llc | System and method for providing location services for multiple access networks from a single location server |
US20100127928A1 (en) * | 2008-11-24 | 2010-05-27 | Andrew Llc | System and method for server side detection of falsified satellite measurements |
US20100130225A1 (en) * | 2008-11-26 | 2010-05-27 | Andrew Llc | System and method for multiple range estimation location |
US20100156713A1 (en) * | 2008-12-23 | 2010-06-24 | Andrew Llc | System and method for determining a reference location of a mobile device |
USRE41531E1 (en) | 1998-02-19 | 2010-08-17 | Round Rock Research, Llc | Communications systems for radio frequency identification (RFID) |
US20100232355A1 (en) * | 2009-03-13 | 2010-09-16 | Harris Corporation | Asymmetric broadband data network |
US7808367B2 (en) | 1999-08-09 | 2010-10-05 | Round Rock Research, Llc | RFID material tracking method and apparatus |
US7839285B2 (en) | 1997-08-20 | 2010-11-23 | Round Rock Resarch, LLC | Electronic communication devices, methods of forming electrical communication devices, and communications methods |
US20100316006A1 (en) * | 2009-06-11 | 2010-12-16 | Andrew Llc | System and method for supl held interworking |
US20100328148A1 (en) * | 2007-12-07 | 2010-12-30 | Andrew Corporation | Method and System for Providing Assistance Data for A-GPS Location of Handsets in Wireless Networks |
US20110068977A1 (en) * | 2009-09-23 | 2011-03-24 | Andrew Llc | Enhancing location accuracy using multiple satellite measurements based on environment |
US20110090121A1 (en) * | 2009-10-15 | 2011-04-21 | Andrew Llc | Location measurement acquisition optimization with monte carlo simulation |
USRE42344E1 (en) | 1998-02-19 | 2011-05-10 | Round Rock Research, Llc | Method and apparatus to manage RFID tags |
US20110171912A1 (en) * | 2010-01-08 | 2011-07-14 | Andrew, Llc | System and Method for Mobile Location By Proximity Detection |
US8000701B2 (en) | 2006-05-16 | 2011-08-16 | Andrew, Llc | Correlation mechanism to communicate in a dual-plane architecture |
US8019339B2 (en) | 2006-05-16 | 2011-09-13 | Andrew Llc | Using serving area identification in a mixed access network environment |
US8032149B2 (en) | 2002-08-29 | 2011-10-04 | Andrew Llc | Tasking and reporting method and implementation for wireless appliance location systems |
US8060109B2 (en) | 1997-08-04 | 2011-11-15 | Enovsys Llc | Authorized location reporting mobile communication system |
US8073463B2 (en) | 2008-10-06 | 2011-12-06 | Andrew, Llc | System and method of UMTS UE location using uplink dedicated physical control channel and downlink synchronization channel |
US8170585B2 (en) | 2007-11-14 | 2012-05-01 | Andrew, Llc | Ranging in UMTS networks |
USRE43382E1 (en) | 1998-02-19 | 2012-05-15 | Round Rock Research, Llc | Method of addressing messages and communications systems |
US8213955B2 (en) | 2008-05-01 | 2012-07-03 | Andrew, Llc | Network measurement report caching for location of mobile devices |
US8249622B2 (en) | 2008-11-26 | 2012-08-21 | Andrew, Llc | System and method for multiple range estimation location |
US8289210B2 (en) | 2009-10-15 | 2012-10-16 | Andrew Llc | Location measurement acquisition adaptive optimization |
US8380222B2 (en) | 2008-11-26 | 2013-02-19 | Andrew Llc | System and method for multiple range estimation location |
US8391884B2 (en) | 2009-03-26 | 2013-03-05 | Andrew Llc | System and method for managing created location contexts in a location server |
US8489122B2 (en) | 2010-12-09 | 2013-07-16 | Andrew Llc | System and method for total flight time ratio pattern matching |
US8526968B2 (en) | 2011-02-14 | 2013-09-03 | Andrew Llc | System and method for mobile location by dynamic clustering |
US8566839B2 (en) | 2008-03-14 | 2013-10-22 | William J. Johnson | System and method for automated content presentation objects |
US8600341B2 (en) | 2008-03-14 | 2013-12-03 | William J. Johnson | System and method for location based exchanges of data facilitating distributed locational applications |
US8606851B2 (en) | 1995-06-06 | 2013-12-10 | Wayport, Inc. | Method and apparatus for geographic-based communications service |
US8627416B2 (en) | 2007-07-12 | 2014-01-07 | Wayport, Inc. | Device-specific authorization at distributed locations |
US8634796B2 (en) | 2008-03-14 | 2014-01-21 | William J. Johnson | System and method for location based exchanges of data facilitating distributed location applications |
US8639267B2 (en) | 2008-03-14 | 2014-01-28 | William J. Johnson | System and method for location based exchanges of data facilitating distributed locational applications |
US8718673B2 (en) | 2010-05-21 | 2014-05-06 | Maple Acquisition Llc | System and method for location assurance of a mobile device |
US8843515B2 (en) | 2012-03-07 | 2014-09-23 | Snap Trends, Inc. | Methods and systems of aggregating information of social networks based on geographical locations via a network |
US8897813B2 (en) | 2012-02-03 | 2014-11-25 | Andrew Llc | LTE user equipment positioning system and method |
US8897741B2 (en) | 2009-11-13 | 2014-11-25 | William J. Johnson | System and method for mobile device usability by locational conditions |
WO2014191777A2 (en) * | 2013-05-31 | 2014-12-04 | Cambium Networks Ltd | Antenna arrangement and methods of transmission and reception at a base station |
US8942693B2 (en) | 2008-03-14 | 2015-01-27 | William J. Johnson | System and method for targeting data processing system(s) with data |
US8958754B2 (en) | 2010-09-29 | 2015-02-17 | Andrew, Llc | System and method for sub-coherent integration for geo-location using weak or intermittent signals |
US9423508B2 (en) | 2012-01-12 | 2016-08-23 | Commscope Technologies Llc | Autonomous Transmit Chain Delay Measurements |
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US9538495B2 (en) | 2009-08-05 | 2017-01-03 | Commscope Technologies Llc | System and method for hybrid location in an LTE network |
US9715001B2 (en) | 2011-06-13 | 2017-07-25 | Commscope Technologies Llc | Mobile location in a remote radio head environment |
US9894489B2 (en) | 2013-09-30 | 2018-02-13 | William J. Johnson | System and method for situational proximity observation alerting privileged recipients |
US10255907B2 (en) | 2015-06-07 | 2019-04-09 | Apple Inc. | Automatic accent detection using acoustic models |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4910794A (en) * | 1988-08-04 | 1990-03-20 | Norand Corporation | Mobile radio data communication system and method |
GB9417318D0 (en) * | 1994-08-27 | 1994-10-19 | Philips Electronics Uk Ltd | Microwave cellular communications system and adaptable microwave transmitter |
RU2144264C1 (en) | 1998-11-05 | 2000-01-10 | ЯН Давид Евгеньевич | Method and portable computer for remote wireless transmission and reception of coded information (options) |
Citations (4)
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US3714650A (en) * | 1970-07-30 | 1973-01-30 | Raytheon Co | Vehicle command and control system |
US4112421A (en) * | 1975-04-16 | 1978-09-05 | Information Identification Company, Inc. | Method and apparatus for automatically monitoring objects |
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US4685149A (en) * | 1977-07-29 | 1987-08-04 | Rockwell International Corporation | Meteor scatter burst communication system |
-
1987
- 1987-04-08 US US07/035,791 patent/US4845504A/en not_active Expired - Lifetime
-
1988
- 1988-04-05 WO PCT/US1988/001062 patent/WO1988008140A1/en unknown
- 1988-04-05 AU AU18076/88A patent/AU1807688A/en not_active Abandoned
Patent Citations (4)
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US3714650A (en) * | 1970-07-30 | 1973-01-30 | Raytheon Co | Vehicle command and control system |
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Non-Patent Citations (12)
Title |
---|
"Diversity Reception for Meteoric Communications" by Ladd, IRE Transactions on Communications Systems, Jun. 1961. |
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Cited By (238)
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US5046130A (en) * | 1989-08-08 | 1991-09-03 | Motorola, Inc. | Multiple communication path compatible automatic vehicle location unit |
US5134715A (en) * | 1989-11-17 | 1992-07-28 | Sundstrand Corporation | Meteor scatter burst communications systems |
US5032845A (en) * | 1990-02-08 | 1991-07-16 | D.G.R., Inc. | Vehicle locating system with Loran-C |
US5278568A (en) * | 1992-05-01 | 1994-01-11 | Megapulse, Incorporated | Method of and apparatus for two-way radio communication amongst fixed base and mobile terminal users employing meteor scatter signals for communications inbound from the mobile terminals and outbound from the base terminals via Loran communication signals |
US8018340B2 (en) | 1992-08-12 | 2011-09-13 | Round Rock Research, Llc | System and method to track articles at a point of origin and at a point of destination using RFID |
US7746230B2 (en) | 1992-08-12 | 2010-06-29 | Round Rock Research, Llc | Radio frequency identification device and method |
US7583192B2 (en) | 1992-08-12 | 2009-09-01 | Keystone Technology Solutions, Llc | Radio frequency identification device and method |
US5742911A (en) * | 1992-10-03 | 1998-04-21 | Motorola, Inc. | Sectorized cellular radio base station antenna |
GB2271246A (en) * | 1992-10-03 | 1994-04-06 | Motorola Ltd | Sectorized cellular radio base station antenna |
GB2271246B (en) * | 1992-10-03 | 1997-02-12 | Motorola Ltd | Sectorized cellular radio base station antenna |
US5488737A (en) * | 1992-11-17 | 1996-01-30 | Southwestern Bell Technology Resources, Inc. | Land-based wireless communications system having a scanned directional antenna |
US5701583A (en) * | 1992-11-17 | 1997-12-23 | Southwestern Bell Technology Resources, Inc. | Land-based wireless communications system having a scanned directional antenna |
US5627544A (en) * | 1992-12-15 | 1997-05-06 | Micron Technology, Inc. | Data communication method using identification protocol |
US20080117025A1 (en) * | 1992-12-15 | 2008-05-22 | Tuttle John R | RFID System and Method for Wirelessly Interfacing With an Interrogator |
US5841770A (en) * | 1992-12-15 | 1998-11-24 | Micron Technology, Inc. | Data communication system using indentification protocol |
US5583850A (en) * | 1992-12-15 | 1996-12-10 | Micron Technology, Inc. | Data communication system using identification protocol |
US5500650A (en) * | 1992-12-15 | 1996-03-19 | Micron Technology, Inc. | Data communication method using identification protocol |
US6052582A (en) * | 1994-03-17 | 2000-04-18 | Endlink Corporation | Sectorized multi-function communication system |
US5596333A (en) * | 1994-08-31 | 1997-01-21 | Motorola, Inc. | Method and apparatus for conveying a communication signal between a communication unit and a base site |
US20070290854A1 (en) * | 1995-04-11 | 2007-12-20 | Tuttle John R | RF Identification System with Restricted Range |
US20050040961A1 (en) * | 1995-04-11 | 2005-02-24 | Tuttle John R. | RF identification system with restricted range |
US20070290811A1 (en) * | 1995-04-11 | 2007-12-20 | Tuttle John R | RF Identification System with Restricted Range |
US8631128B2 (en) | 1995-06-06 | 2014-01-14 | Wayport, Inc. | Method and apparatus for geographic-based communications service |
US8417763B2 (en) | 1995-06-06 | 2013-04-09 | Wayport, Inc. | Providing information to a computing device based on known location and user information |
US8892736B2 (en) | 1995-06-06 | 2014-11-18 | Wayport, Inc. | Providing an advertisement based on a geographic location of a wireless access point |
US5969678A (en) * | 1995-06-06 | 1999-10-19 | Wayport, Inc. | System for hybrid wired and wireless geographic-based communications service |
US6326918B1 (en) * | 1995-06-06 | 2001-12-04 | Wayport, Inc. | Method and apparatus for geographic-based communications service |
US8990287B2 (en) | 1995-06-06 | 2015-03-24 | Wayport, Inc. | Providing promotion information to a device based on location |
US8606851B2 (en) | 1995-06-06 | 2013-12-10 | Wayport, Inc. | Method and apparatus for geographic-based communications service |
US8583723B2 (en) | 1995-06-06 | 2013-11-12 | Wayport, Inc. | Receiving location based advertisements on a wireless communication device |
US8929915B2 (en) | 1995-06-06 | 2015-01-06 | Wayport, Inc. | Providing information to a computing device based on known location and user information |
US20080045241A1 (en) * | 1995-06-06 | 2008-02-21 | Stewart Brett B | Method and Apparatus for Geographic-Based Communications Service |
US8509246B2 (en) | 1995-06-06 | 2013-08-13 | Wayport, Inc. | Method and apparatus for geographic-based communications service |
US8478887B2 (en) | 1995-06-06 | 2013-07-02 | Wayport, Inc. | Providing advertisements to a computing device based on a predetermined criterion of a wireless access point |
US6259405B1 (en) | 1995-06-06 | 2001-07-10 | Wayport, Inc. | Geographic based communications service |
US5835061A (en) * | 1995-06-06 | 1998-11-10 | Wayport, Inc. | Method and apparatus for geographic-based communications service |
US8250204B2 (en) | 1995-06-06 | 2012-08-21 | Wayport, Inc. | Method and apparatus for geographic-based communications service |
US8199733B2 (en) | 1995-06-06 | 2012-06-12 | Wayport, Inc. | Method and apparatus for geographic-based communications service |
US20080049696A1 (en) * | 1995-06-06 | 2008-02-28 | Stewart Brett B | Method and apparatus for geographic-based communications service |
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WO1988008140A1 (en) | 1988-10-20 |
AU1807688A (en) | 1988-11-04 |
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